IfcSequenceEnum

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcSequenceEnum			MOVED	Schema changed from IFCKERNEL to IFCPROCESSEXTENSION.

Semantic definitions at the type

Type definition

IfcSequenceEnum is an enumeration that defines the different ways in which a time lag is applied to a sequence between two processes.

HISTORY New entity in IFC1.0

Enumeration definition

Constant	Description
START_START	The predecessor task must start before the successor task may start.
START_FINISH	The predecessor task must start before the successor task may finish.
FINISH_START	The predecessor task must finish before the successor task may start.
FINISH_FINISH	The predecessor task must finish before the successor task may finish.
USERDEFINED
NOTDEFINED

Formal representations

XSD Specification

 <xs:simpleType name="IfcSequenceEnum">

  <xs:restriction base="xs:string">

   <xs:enumeration value="start_start"/>

   <xs:enumeration value="start_finish"/>

   <xs:enumeration value="finish_start"/>

   <xs:enumeration value="finish_finish"/>

   <xs:enumeration value="userdefined"/>

   <xs:enumeration value="notdefined"/>

  </xs:restriction>

 </xs:simpleType>

EXPRESS Specification


TYPE IfcSequenceEnum = ENUMERATION OF (

 START_START, 
 START_FINISH, 
 FINISH_START, 
 FINISH_FINISH, 
 USERDEFINED, 
 NOTDEFINED);
END_TYPE;


 EXPRESS-G diagram